I had to add hot water to the bin my carboy is in. I pitched my yeast at 4PM yesterday and placed it in a tub of tap water, ambient temp is around 67 in my house. When I woke up at 4AM, fermentation was going but the carboy said it was about 58 degrees, not ideal but this method should be useful come spring and summer. Since 1450 likes it around 64 I decided to add some hot water to raise up the temp.